After input from many of you guys and the NYC group, I am announcing planetrationalist.com
There's a lot of different directions this sort of idea could go in, but I figured that this could be a good-enough first effort.
Enjoy, and let me know what you think.
I've re-instated twitter so far. The issues are: general visual clutter, I found a way to mitigate this issue by using a trick to force lower the visual contrast of the buttons, and that these social buttons often really slow down the loading of the page, especially if you want the dynamic share/like/retweet counters for every item. I might leave the counter on twitter but omit it for the others and see what the page load is like.
I'm not sure what email-sharing service to use... facebook has one in its "share" button, there are probably others.